FE/FC New IMS tank for Austrian Husky

IMS has a 3.1 gallon tank out now for sale. It looks really weird though. It uses the OEM shrouds but they are mounted at a really weird angle... Or is it an optical illusion?
Some of IMS's claims are not consistant though. IMS claims the OEM tank is only 1.9 gallons when in fact it's over 2.25 gallons but 3.1 for my needs is about perfect. For my 501 that gives me a 150 mile range plus.
https://www.imsproducts.com/News/index.cfm?IDSet=30

Could be. But these tanks claim to fit the 2T and 4T models so it's more of a 3/4 gallon increase by average. Still better range with not much weight increase overall.

Has anyone here tried stretching/swelling their stock tank with boiling water and air pressure yet? I'm tempted but nervous to try it.

Yes, I stretched my 2014 TE300 tank. I gained about 2 liters ( a little over half gallon ) The side of the petcock stretched a small amount more than the other side. I'm happy with the results.